
2. 检索术语 Vocabulary
• ID: a unique concept ID in OHDSI OMOP CDM
• Concept Code: concept identifier in the source
vocabulary
• Class: categories defined by the source vocabulary
• RC: The record count. This will show the number of
records that are coded with this concept in the
• DRC: The descendant record count. The DRC column will
show the sum of all descendant concepts that are coded
in the CDM.
• Domain: categories defined by the OMOP CDM (e.g.,
Condition, Person, Observation, Specimen, etc)
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